can anyone explain this chap please ╥﹏╥

Chester's parents died in a tragic accident, and once he realized that, he felt free from their grasp but Jesse doesn't understand Chester's emotion.

and please can you tell me why chester created that machine?

Yeah that's a bit unclear but it is first to please Jesse's mother by contributing to the Brown company, to make sure Jesse's secret doesn't get revealed by that stupid maid and also to finally use it to eventually control Jesse.